Stoppers
Stoppers, also known as bungs, are used to give an airtight seal to laboratory flasks and test tubes by fitting tightly inside the neck of the container and preventing material from spilling. Stoppers can be made of glass, cork, rubber, or silicone. They are typically designed with a conical shape, but straight, flanged, and tapered options are also available.
Stoppers are the preferred choice for many applications requiring a tighter seal or a greater degree of chemical resistance. They also provide a good seal when a solution needs to be shaken or mixed without spilling. Stoppers are generally cylindrical in shape and have a tapered bottom end. They may be marked with a stopper number or size on the top and bottom diameters of the stopper. Sizing can vary among manufacturers.
Stoppers are available in a solid design or with holes known as positions placed in the top. Positions allow easy access to the material contained in the sealed vessel by pipettes, tubing, or other equipment without full removal of the stopper.
What Types of Stoppers Are Available?
• Turnover stoppers have external serrations to create an excellent internal seal combined with a flexible turnover sleeve that folds down over the container’s neck to create a double seal
• Serum bottle or vial stoppers have two or three legs with external serrations or straight sides and a flanged top to create an airtight seal
• Straight bromobutyl plug-type stoppers provide a maximum seal for vials and serum bottles with a straight-wall glass finish
• Ultra-pure, straight bromobutyl plug-type stoppers provide high chemical purity and low gas permeability. They offer excellent performance during freeze drying processes such as lyophilization, where stoppers must remain stable during transfer and sublimination phases
• Silicone recessed septa stoppers are non-toxic and have external serrations to create an effective internal seal
Med Vet International Compression Plate 4.5mm, 6-hole, 103mm L, J0427E
Use with 4.5mm cortical screws to produce fracture-site compression.
Grainger 3 Hole - Center Tap Base Plate Double
The Tripp Lite 16U351 is a 19-inch open frame rack enclosure cabinet with a depth of 35 inches. It has an adjustable mounting depth from 22 to 35 inches and comes with mounting rails, leveling feet and a vented top panel. The steel enclosure has a weight capacity of 1000 lbs and is compatible with EIA-310-D mounting rails. The cabinet comes unassembled in a flat pack box to reduce shipping costs. Overall, the 16U351 provides an open and adaptable rack enclosure solution for mounting up to 16U of 19-inch rackmount equipment.
Grainger Stopper Sz 3 18 mm BDia Black 0 PK40
The 16ZD43 is a 3M Novec 1230 Clean Agent Fire Extinguisher. It is UL rated 2-B:C and contains 5 lbs of Novec 1230 fluid. This clean agent extinguisher is intended for Class A, B, and C fires. It uses a non-conductive, non-corrosive agent that leaves no residue and is safe for use around sensitive electronics. The extinguisher has a chrome-plated steel cylinder with an enameled aluminum valve body and discharge hose. It comes equipped with a wall hook and pressure gauge. This compact and lightweight fire extinguisher is well-suited for computer rooms, telecommunication and medical facilities. It effectively suppresses fires while avoiding damage to critical and expensive equipment.
Grainger Stopper Sz 1 14 mm BDia Black 0 PK65
The product is a 16VA53 transformer by Hammond Manufacturing. It is a single phase transformer with a primary voltage of 120V and secondary voltage of 24V. The transformer has a capacity of 16VA and can output a maximum secondary current of 0.67A. It features an open frame design and measures approximately 2.4" x 2.2" x 2.4". The transformer has an operating temperature range of -20°C to 40°C and is RoHS compliant. It is designed for PCB mounting and low voltage control applications. The product is made in Canada and comes with a 5 year warranty from Hammond Manufacturing.
Grainger Stopper Sz 10 42 mm BDia Black 0 PK8
The Grainger 16VC03 is a 3/4 HP, 115V, 1725 RPM, 56C Frame, Open Drip Proof, Single Phase, Ball Bearing, Electric Motor. It has a NEMA standard 56C frame with a 1.15 service factor. The motor is totally enclosed and fan cooled with Class F insulation and a thermally protected design. It can provide 0.56 kW of output power. The 16VC03 is built for general purpose applications requiring up to 3/4 horsepower.
Grainger Stopper Sz 11 48 mm BDia Black 0 PK7
The Grainger 16VC08 is a 16-ounce aerosol can of CRC Brakleen non-chlorinated brake parts cleaner. It is a fast drying, non-flammable cleaner that removes oil, grease, brake fluid, and other contaminants from brake linings and drums. It contains no 1,1,1 trichloroethane, chlorofluorocarbons, or any ozone depleting substances. This brake parts cleaner features a 360-degree valve for convenient application at any angle.
Chemglass Life Sciences Rubber Stopper, #00, One Hole, Black
Rubber Stopper, #00, One Hole, Black. These stoppers are suitable for practically all general laboratory uses. Composition ensures resiliency and pliability over a long period and withstands laboratory conditions without hardening. The dimensions are in accordance with specifications established by the N.B.S. and are low in free sulfur (1/2%). Autoclavable at 250F for 30 minutes under water or steam conditions only (not dry heat). End user must test for their specific application. Diameter: Top (15mm), Bottom (10mm). Length: (25mm). Diameter of hole: (3mm).